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Quadratotrigonia
Taxonomy
Quadratotrigonia was named by Dietrich (1933) [Sepkoski's age data: J Tith K Ceno]. It is not extant. Its type is Trigonia nodosa.
It was synonymized subjectively with Yaadia by Cox (1952).
It was assigned to Trigoniidae by Vokes (1980); to Trigonioida by Sepkoski (2002); and to Quadratotrigoniini by Bouchet et al. (2010).
It was synonymized subjectively with Yaadia by Cox (1952).
It was assigned to Trigoniidae by Vokes (1980); to Trigonioida by Sepkoski (2002); and to Quadratotrigoniini by Bouchet et al. (2010).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1933 | Quadratotrigonia Dietrich |
| 1980 | Quadratotrigonia Vokes p. 99 |
| 2002 | Quadratotrigonia Sepkoski |
| 2010 | Quadratotrigonia Bouchet et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
No diagnoses are available